Category:Carnegie Embryo 7762

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This Embryology category includes pages and images that relate to the Carnegie Collection Embryo No. 7762 and classified as Stage 6 occurring during Week 2.

Carnegie Collection Embryos
Serial No.	Grade	Fixative	Embedding Medium	Thinness (µm)	Stain	Year	Notes
7762	Good	Zenker—formol	P	8	?	1940	Wilson (1945)

Carnegie No. 7762, Rochester. Described by Wilson (1945).^[1]

Curettage. Chorion, 2.3 x 2.2 x 2 mm. Larger villi have a mesoblastic core “and some show a tendency toward branching.” Moreover, “no evidence of actual blood vessels is seen in the villi, but in many of them groupings of angioblasts are observed.” Chorionic cavity, 1.75 x 1.3 x 1 mm.

Embryonic disc, 0.313 x 0.22 mm. Primitive streak, 0.04 mm. No definite allantoic diverticulum. Amniotic duct. Median reconstruction published (ibid., plate 3; Mazanec, 1959, fig. 36).^[2]

References

↑ Wilson KM. A normal human ovum of sixteen days development (the Rochester ovum). (1945) Carnegie Instn. Wash. Publ. 557, Contrib. Embryol., Carnegie Inst. Wash., 31: 101-106.
↑ Mazanec K. Blastogenese des Menschen. (1959) Fischer, Jena.

Carnegie Collection - Stage 6
Serial No.	Grade	Fixative	Embedding Medium	Thinness (µm)	Stain	Year	Notes
6026	Poor	?	?	6?	(Stain - Haematoxylin Eosin)	1929	Lockyer embryo. Abnormal. Ramsey (1937)
6734	Poor	Zenker—acetic	P	10	(Stain - Haematoxylin Eosin)	1934	Yale embryo. Ramsey (1938)
6900	Poor	Formol	P	15	(Stain - Haematoxylin Eosin)	1940	Linzenmeier (1914)
7634	Poor	Formol	P	10	(Stain - Haematoxylin Eosin) etc.	1940	Torpin embryo. Kraﬂca (1941)
7762	Good	Zenker—formol	P	8	?	1940	Wilson (1945)
7800	Exc.	?	C—P	8	(Stain - Haematoxylin Eosin)	1940	Abnormal
7801	Exc.	Bouin	C—P	8	(Stain - Haematoxylin Eosin)	1940	Heuser et al. (1945)
7850	Exc.	Alc. & Bouin	C—P	6	(Stain - Haematoxylin Eosin)	1940	Abnormal
8290	Exc.	Bouin	C—P	8	H. phlox.	1944
8360	Exc.	Alc. & Bouin	C—P	6	(Stain - Haematoxylin Eosin), phlox.	1944
8362	Poor	p	C—P	6	(Stain - Haematoxylin Eosin), phlox	1944
8672	Exc.	Ale. & Bouin	C—P	6	(Stain - Haematoxylin Eosin)	1949
8819	Exc.	Formol—chrom. subl.	C—P	8	(Stain - Haematoxylin Eosin)	1951	Edwards-Jones-Brewer (H1496). Brewer (1937, 38)^[1]^[2]
8905	Poor	Ale.	p	6	(Stain - Haematoxylin Eosin), phlox.	1951	Abnormal
8910	Good	Formol	C—P	8	(Stain - Haematoxylin Eosin), phlox.	1951
9222	Good	Bouin	C—P	6 & 10	Azan	1954	Abnormal. Possibly stage 7
9250	Exc.	Bouin	p	8	(Stain - Haematoxylin Eosin)	1954
9595	Poor	p	p	8	(Stain - Haematoxylin Eosin)	1958
10003	Good	Bouin	p	5	Various	1963
Abbreviations Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections. Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P). Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution) ? - unknown or not determined.
References ↑ Brewer JI. A normal human ovum in a stage preceding the primitive streak (The Edwards-Jones-Brewer ovum). (1937) Amer. J Anat., 61: 429-481. ↑ Brewer JI. A human embryo in the bilaminar blastodisc stage (The Edwards-Jones-Brewer ovum). (1938) Contrib. Embryol., Carnegie Inst. Wash. Publ. 496, 27: 85-93.

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[1] Wilson KM. A normal human ovum of sixteen days development (the Rochester ovum). (1945) Carnegie Instn. Wash. Publ. 557, Contrib. Embryol., Carnegie Inst. Wash., 31: 101-106.

[2] Mazanec K. Blastogenese des Menschen. (1959) Fischer, Jena.

[Brewer1937-3] Brewer JI. A normal human ovum in a stage preceding the primitive streak (The Edwards-Jones-Brewer ovum). (1937) Amer. J Anat., 61: 429-481.

[Brewer1938-4] Brewer JI. A human embryo in the bilaminar blastodisc stage (The Edwards-Jones-Brewer ovum). (1938) Contrib. Embryol., Carnegie Inst. Wash. Publ. 496, 27: 85-93.

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